Question about "Shot Heard around the World" original photo

[Iwantmorecards77]

Hey all,

I just have a couple of questions. My grandfather was a photographer and snapped the shot of Bobby Thomson's famous home run in 1951. It's the photo of him swinging and the ball heading towards the stands (many prints have the dotted line that show the track of the ball.) My grandfather and his photo was featured in a Joshua Prager book.

We have a family member that has hit some tough times, including some difficult medical problems - so they are thinking it may be time to get some help.

What is believed to be the original photo as well as the negatives of that photo, are in the family. What would something like that be valued at? What auction houses do you feel would be interested or the best to handle something like this?

I've attached the photo (not the original but one from the internet - just so you know which photo I'm discussing.)

Any help would be greatly appreciated.

Thanks,

Todd